SOA Design & Architecture Lab - S90.09 FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

You are an architect with a project team building services for Service Inventory A . You are
told that no SLAs for Service B and Service C are available. You cannot determine how
available these services will be, but it has been confirmed that both of these services
support atomic transactions and the issuance of positive and negative acknowledgements.
However, you also find out that the services in Service Inventory B use different data
models than the services in Service Inventory A.
Furthermore, recent testing results have shown that the performance of Service D is steady and reliable. However, Service D uses a
different transport protocol than the services in Service Inventory A.
The response time of Service A is not a primary concern, but Service Consumer A does need to be able to issue
request messages to Service A 24 hours a day without disruption. What steps can be taken
to fulfill these requirements?

A. The Asynchronous Queuing pattern is applied so that a central messaging queue is
positioned between Service A and Service B and between Service A and Service C and
between Service A and Service D and so that a separate messaging queue is positioned
between Service A and Service Consumer A.
The Data Model Transformation pattern is
applied to enable communication between Service A and Service B and between Service A
and Service C . The Protocol Bridging pattern is applied to enable communication between
Service A and Service D . B. The Event-Driven Messaging pattern is applied so that a subscriber-publisher
relationship is established between Service Consumer A and Service A . This gives Service
A the flexibility to provide its response to Service Consumer A whenever it is able to collect
the three data values without having to require that Service Consumer A remain stateful.
The Asynchronous Queuing pattern is applied so that a central messaging queue is
positioned between Service A and Service B and between Service A and Service C . The
Data Model Transformation and Protocol Bridging patterns are applied to enable
communication between Service A and Service B and between Service A and Service C .
The Service Autonomy principle is further applied to Service A in order to improve its
overall runtime behavioral predictability. C. The Reliable Messaging pattern is applied so that a system of acknowledgements is
established between Service Consumer A and Service A . This gives Service A the
flexibility to provide Service Consumer A with acknowledgements that indicate that the
processing steps that are occurring between Service A and Service B, Service C, and
Service D are progressing. The Asynchronous Queuing pattern is applied so that a central
messaging queue is positioned between Service A and Service B and between Service A
and Service C and between Service A and Service D . The Redundant Implementation
pattern is applied so that a copy of Service D is brought in-Upon reviewing these
requirements it becomes D with a standardized service contract that is in compliance with
the design standards used in Service Inventory A. D. None of the above.

Discussion 0

Correct Answer: A Vote an answer

Question 2

When Service A receives a message from Service Consumer A(1),the message is
processed by Component A.
This component first invokes Component B (2), which uses
values from the message to query Database A in order to retrieve additional data.
Component B then returns the additional data to Component A.
Component A then invokes Component C (3), which interacts with the API of a legacy
system to retrieve a new data value. Component C then returns the data value back to
Component A.
Next, Component A sends some of the data it has accumulated to Component D (4), which
writes the data to a te>X file that is placed in a specific folder. Component D then waits
until this file is imported into a different system via a regularly scheduled batch import.
Upon completion of the import, Component D returns a success or failure code back to
Component A.
Component A finally sends a response to Service Consumer A (5) containing all of the data
collected so far and Service Consumer A writes all of the data to Database B (6).
Components A, B, C.
and D belong to the Service A service architecture. Database A, the
legacy system, and the file folders are shared resources within the IT enterprise.

Service A is an entity service with a service architecture that has grown over the past few
years. As a result of a service inventory-wide redesign project, you are asked to revisit the
Service A service architecture in order to separate the logic provided by Components B, C,
and D into three different utility services without disrupting the behavior of Service A as it
relates to Service Consumer A . What steps can be taken to fulfill these requirements?

A. The Legacy Wrapper pattern can be applied so that Component B is separated into a
separate utility service that wraps the shared database. The Legacy Wrapper pattern can
be applied again so that Component C is separated into a separate utility service that acts
as a wrapper for the legacy system API. The Legacy Wrapper pattern can be applied once
more to Component D so that it is separated into another utility service that provides
standardized access to the file folder. The Service Facade pattern can be applied so that
three Facade components are added: one between Component A and each of the new
wrapper utility services. This way, the Facade components can compensate for any change
in behavior that may occur as a result of the separation. The Service Composability
principle can be further applied to Service A and the three new wrapper utility services so
that all four services are optimized for participation in the new service composition. This will
help make up for any performance loss that may result from splitting the three components
into separate services. B. The Legacy Wrapper pattern can be applied so that Component B is separated into a
separate utility service that wraps the shared database. The Legacy Wrapper pattern can
be applied again so that Component C is separated into a separate utility service that acts
as a wrapper for the legacy system API. Component D is separated into a separate service
and the Event-Driven Messaging pattern is applied to establish a publisher-subscriber
relationship between this new service and Component A.
The interaction between Service Consumer A and Component A is then redesigned so that Component A first interacts with
Component B and the new wrapper service. Service A then issues a final message back to
Service Consumer A.
The Service Composability principle can be further applied to Service
A and the three new wrapper utility services so that all four services are optimized for
participation in the new service composition. This will help make up for any performance
loss that may result from splitting the three components into separate services. C. The Legacy Wrapper pattern can be applied so that Component B is separated into a
separate wrapper utility service that wraps the shared database. The Asynchronous
Queuing pattern can be applied so that a messaging queue is positioned between
Component A and Component C, thereby enabling communication during times when the
legacy system may be unavailable or heavily accessed by other parts of the IT enterprise.
The Service Facade pattern can be applied so that a Facade component is added between
Component A and Component D so that any change in behavior can be compensated. The
Service Autonomy principle can be further applied to Service A to help make up for any
performance loss that may result from splitting the component into a separate wrapper
utility service. D. None of the above.

Discussion 0

Correct Answer: A Vote an answer

Question 3

The Client and Vendor services are agnostic services that are both currently part of
multiple service compositions. As a result, these services are sometimes subjected to
concurrent access by multiple service consumers.
The Client service is an entity service that primarily provides data access logic to a client
database but also provides some calculation logic associated with determining a client's
credit rating. The Vendor service is also an entity service that provides some data access
logic but can also generate various dynamic reports.
After reviewing historical statistics about the runtime activity of the two services, it was
discovered that the majority of concurrent runtime access is related to the processing of
business rules. With the Client service, it is the calculation logic that is frequently required
and with the Vendor service it is the dynamic reporting logic that needs to be accessed
separately from the actual report generation.

Currently, due to the increasing amount of concurrent access by service consumers, the
runtime performance of both the Client and Vendor services has worsened and has
therefore reduced their effectiveness as service composition members. What steps can be
taken to solve this problem without introducing new services?

A. The Rules Centralization pattern can be applied by extracting the business rule logic
from the Client and Vendor services and placing it into a new Rules service. This will
naturally improve the runtime performance of the Client and Vendor services because they
will no longer be subjected to the high concurrent access of service consumers that require
access to the business rules logic. B. None of the above. C. The Redundant Implementation pattern can be applied to the Client and Vendor
services, thereby establishing duplicate implementations that can be accessed when a
service reaches its runtime usage threshold. The Intermediate Routing pattern can be
further applied to provide load balancing logic that can, at runtime, determine which of the
redundant service implementations is the least busy for a given service consumer request. D. The Rules Centralization pattern can be applied together with the Redundant
Implementation pattern to establish a scalable Rules service that is redundantly
implemented and therefore capable of supporting high concurrent access from many
service consumers. The Service Abstraction principle can be further applied to hide the
implementation details of the Rules service.

Discussion 0

Correct Answer: C Vote an answer

Question 4

It has been confirmed that Policy A and Policy B are, in fact, the same policy and that the
security credential check performed by Service Agent B also needs to be carried out on
messages sent to Service B .

How can this service composition architecture be changed to reduce the redundancy of
policy content and fulfill the new security requirement?

A. The Policy Centralization pattern can be applied so that Policy A and Policy B are
combined into the same policy. The Service Agent pattern is then applied to introduce a
new service agent (called Service Agent D) which carries out the validation and
enforcement of Policy A and Policy B.
Service Agent B can be moved so that it performs
the security credential check for Service B, but not for Service A . B. The Policy Centralization pattern can be applied so that Service Agent A is changed to
enforce the policy for messages sent to Service A and Service B and to perform the
security credential check for Service A and Service B . C. None of the above. D. The Policy Centralization pattern can be applied so that Policy A and Policy B are
combined into the same policy. The policy enforcement logic is removed from Service
Agent C and Service Agent A is then used to enforce the policy for messages sent to
Service A and Service B . Service Agent B can be used to perform the security credential
check for Service A and Service B .

Discussion 0

Correct Answer: D Vote an answer